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Upsilon production cross section in pp collisions at √s=7  TeV


CMS Collaboration; Amsler, C; Chiochia, V; Snoek, H; Verzetti, M; Favaro, C; Millan, B; Ivova, M; Otyugova, P; Schmitt, A; De Visscher, S; Storey, J; Aguiló, E (2011). Upsilon production cross section in pp collisions at √s=7 TeV. Physical Review D, 83(11):112004 .

Abstract

The Υ(1S), Υ(2S), and Υ(3S) production cross sections in proton-proton collisions at √s=7  TeV are measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1±0.3  pb-1. Integrated over the rapidity range |y|<2, we find the product of the Υ(1S) production cross section and branching fraction to dimuons to be σ(pp→Υ(1S)X)·B(Υ(1S)→μ+μ-)=7.37±0.13-0.42+0.61±0.81  nb, where the first uncertainty is statistical, the second is systematic, and the third is associated with the estimation of the integrated luminosity of the data sample. This cross section is obtained assuming unpolarized Υ(1S) production. With the assumption of fully transverse or fully longitudinal production polarization, the measured cross section changes by about 20%. We also report the measurement of the Υ(1S), Υ(2S), and Υ(3S) differential cross sections as a function of transverse momentum and rapidity. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2011 CERN, for the CMS Collaboration

The Υ(1S), Υ(2S), and Υ(3S) production cross sections in proton-proton collisions at √s=7  TeV are measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1±0.3  pb-1. Integrated over the rapidity range |y|<2, we find the product of the Υ(1S) production cross section and branching fraction to dimuons to be σ(pp→Υ(1S)X)·B(Υ(1S)→μ+μ-)=7.37±0.13-0.42+0.61±0.81  nb, where the first uncertainty is statistical, the second is systematic, and the third is associated with the estimation of the integrated luminosity of the data sample. This cross section is obtained assuming unpolarized Υ(1S) production. With the assumption of fully transverse or fully longitudinal production polarization, the measured cross section changes by about 20%. We also report the measurement of the Υ(1S), Υ(2S), and Υ(3S) differential cross sections as a function of transverse momentum and rapidity. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2011 CERN, for the CMS Collaboration

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Additional indexing

Other titles:Measurement of the Inclusive Upsilon production cross section in pp collisions at ps = 7 TeV
Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2011
Deposited On:17 Feb 2012 15:01
Last Modified:05 Apr 2016 15:38
Publisher:American Physical Society
ISSN:1550-7998 (P) 1089-4918 (E)
Publisher DOI:https://doi.org/10.1103/PhysRevD.83.112004
Related URLs:http://arxiv.org/abs/1012.5545
Permanent URL: https://doi.org/10.5167/uzh-59478

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